Yeah, only 12-13% loss, instead of the typical 15%...might be more like 600 at the crank, or just less loss through the drivetrain. Maybe the auto's will put down 480-490RWHP....

12-13% is what regular M6 SS have for drive train loss since they dyno about high 360s low 370s. I think 580 hp is pretty accurate.
The autos are usually about 40 rwhp lower, so I'm guesstimating they an auto ZL1 would dyno about 460 ish.

12-13% is what regular M6 SS have for drive train loss since they dyno about high 360s low 370s. I think 580 hp is pretty accurate.
The autos are usually about 40 rwhp lower, so I'm guesstimating they an auto ZL1 would dyno about 460 ish.

But isn't that using the factor from a L99 auto comparison vs a LS3 m6 instead of an auto CTS-V vs m6 CTS-V or did I misunderstand.

12-13% is what regular M6 SS have for drive train loss since they dyno about high 360s low 370s. I think 580 hp is pretty accurate.
The autos are usually about 40 rwhp lower, so I'm guesstimating they an auto ZL1 would dyno about 460 ish.

There won't be 40 rwhp difference on the ZL1 (More like 20)

The LSA flywheel hp is the same 580 for Auto or Manual where as the L99 is 26hp less than the LS3 right off the bat.

That it puffed from one side of the engine and not the other is what got my attention.

That would be called detonation, on that run. Nothing to do with a break in period, just us exploring the performance of the vehicles at different temperatures and heat soak periods to see the effects of intercooler system efficiencies when heat soaked etc. we are just establishing where the limitations may be before we explore extreme power levels. its all about understanding what the production set up is capable of before pushing it to where we wish to be with these cars. First notes are the intercooler efficiency differences between this set up and the CTSV, inlet depression, obviously exhaust system backpressure, etc.

Numbers are 500-511 at tstat temp, cooler best runoff 524 rwhp. Torque was 490-504 same conditions. We will test intake pullies etc over the next few days and post them up.

Do you guys plan on getting some 1/4 mile runs before the modding starts?

I'm at work, so i can't view the video to see if you ran through the gears "hard" or not. But if so:
Did you notice much difference between throttle input and actual % throttle body opening between shifts to get an idea of how much torque management is dialed in?